Use oslo_config new type PortOpt for port options

The oslo_config library provides new type PortOpt to validate the
range of port now.

Note, rpc_zmq_max_port is a socket port upper limit, so leave it untouched.

Change-Id: Icac28141bcb09e2b894662de1a6497766351919d
Closes-Bug: #1518256
ref: https://github.com/openstack/oslo.config/blob/2.6.0/oslo_config/cfg.py#L1114

oslo_messaging/_drivers/impl_rabbit.py

@@ -89,10 +89,10 @@ rabbit_opts = [
                deprecated_group='DEFAULT',
                help='The RabbitMQ broker address where a single node is '
                     'used.'),
-    cfg.IntOpt('rabbit_port',
-               default=5672,
-               deprecated_group='DEFAULT',
-               help='The RabbitMQ broker port where a single node is used.'),
+    cfg.PortOpt('rabbit_port',
+                default=5672,
+                deprecated_group='DEFAULT',
+                help='The RabbitMQ broker port where a single node is used.'),
     cfg.ListOpt('rabbit_hosts',
                 default=['$rabbit_host:$rabbit_port'],
                 deprecated_group='DEFAULT',

oslo_messaging/_drivers/impl_zmq.py

@@ -81,11 +81,13 @@ zmq_opts = [
                 default=True,
                 help='Shows whether zmq-messaging uses broker or not.'),
 
-    cfg.IntOpt('rpc_zmq_min_port',
-               default=49152,
-               help='Minimal port number for random ports range.'),
+    cfg.PortOpt('rpc_zmq_min_port',
+                default=49152,
+                help='Minimal port number for random ports range.'),
 
     cfg.IntOpt('rpc_zmq_max_port',
+               min=1,
+               max=65536,
                default=65536,
                help='Maximal port number for random ports range.'),
 

oslo_messaging/_drivers/zmq_driver/matchmaker/matchmaker_redis.py

@@ -27,9 +27,9 @@ matchmaker_redis_opts = [
     cfg.StrOpt('host',
                default='127.0.0.1',
                help='Host to locate redis.'),
-    cfg.IntOpt('port',
-               default=6379,
-               help='Use this port to connect to redis host.'),
+    cfg.PortOpt('port',
+                default=6379,
+                help='Use this port to connect to redis host.'),
     cfg.StrOpt('password',
                default='',
                secret=True,